Hello,

I'm using Toxiclibs VerletPhysics in order to create a particle system. I'd like to store additional information about each particle using my custom particle class, where one instance would exist for each particle. The problem is integrating my class with the Toxiclibs VerletParticle class. My solution has been to pass the index of the VerletParticle to my custom particle, so that it can get the VerletParticle from the particles ArrayList every time it updates, and access its current position, velocity, and so on. The problem is that the index of the VerletParticle may change as the user adds and removes particles from the ArrayList.

Passing the index of each VerletParticle to each Particle in initWorld():

for (int i = 0; i < NUM_PARTICLES; i++) {

    VerletParticle p = new VerletParticle(Vec3D.randomVector().scale(3).addSelf(width/2, 0, 0));

    physics.addParticle(p);

    particle[i] = new Particle(i);

 }

Is there a way for my custom class to extend VerletParticle, allowing me to add my own fields and methods? I don't know how to do this, as the physics object only takes the VerletParticle type in addParticle(). This is just what came to mind; I'm sure there is a more elegant solution. I'm somewhat of a novice programmer, so forgive me if the question seems obvious. 

Please let me know if I can clarify. Thanks,

Hi all,

Hey all, 

Hi all,

I followed Dan Shiffman's tutorial but I still feel like I understand very little. Are there any good resources online for learning box2d, for Java even?

My sketch runs fine from the PDE and from the exported jar. When I upload it to openprocessing however, the background() method works and fills the entire sketch, but the particles that are being drawn seem to only fill a small rectangle within the sketch. Here are some screenshots to illustrate the difference:

Hi,

Hi all, 

I'm working on an app using Processing in Eclipse, and have a few questions.

I'm making a sound toy for Android using Android Processing. I first wrote the code in the Processing editor, but am now bringing it in to Eclipse to take advantage of a sound library called libpd. I tried to run the app on my phone, but got these errors in the debug window. (I tried pasting the errors in this post, but for some reason it said the response content was too long...)

Hi,

I'm working with some Processing code in Eclipse, and ArrayList does not seem to be recognized. Is there an alternative? Other Processing types like PShape and PFont work fine.

And another thing; would I put files for fonts and vector images in the Android Project's assets folder?

Thanks

I just downloaded  Electric Sheep and am really impressed by all of the different patterns it seems to produce. Researching it a little, I came across different software used to produce fractal flames, but I would be more interested in making one from scratch in Processing. Does anyone have any experience with this? Is there any reading I should do before attempting one?

So far I've just been using a hack that waits for motionX/motionY to change, if it remains stationary for x number of frames after that, I consider it a mouse, well, finger tap.

http://i.imgur.com/Lfv8s.png

Hi,

Hi all, 

Lately when people ask me 'what I do', I find it hard to answer. I make what you guys would probably call generative art, which is what I spend most of my free time doing. However, I've had no formal training as an artist, and as a result try to stay away from mentioning the word art in fear that what I make falls more under the category of strange nonsense. But enough of that, the real question is where do I go to improve my theory/technical skills as an artist online? It's easy enough for me to find books or tutorials on programming, or even design, and it seems like those two fields have migrated rather successfully to the Internet, but I'm absolutely stumped as far as finding any good entry point for the art world, whatever that is, goes. In a way, I'm more interested in theory or broader concepts, but really anything would be helpful. I hope that makes sense, I guess I figure that I'm not the only one who struggles in this way, which was the motivation for the post. 

I want to make some musical instruments for the Android using Processing, because that is what I'm most familiar with.

I want to use the traer physics library in a project to make particle effects, but on the library's website all the .pde's from the examples have 404'ed. If anyone has any examples I could see just to get the gist of using it, that would be really helpful. 

I'm currently using Shiffman's Processing Kinect library which supplies a depth map. I was wondering how I could take that and use it to create a 2D skeleton, if possible. Not looking for any code here, just a general process I could use to achieve those results. Also, given that we've seen this in several of the Kinect games so far, would it be difficult to have multiple skeletons running at once?

Hi all, I'm trying to get some of the examples in Daniel Shiffman's updated Kinect library to work. I installed openkinect, and have all the libraries in the right place. I'm not really sure what the problem is, but the glview test in the terminal works fine with the Kinect plugged in. I'm running Leopard and am using Processing 1.21. Any help would be appreciated.

I'm following a simple example in a processing book I'm reading, and in the book the PImage is supposed to have a transparent background with the RGB argument in the constructor. Here's the code. 

 Hi all. So I've been working in processing for a few weeks now, and decided I'd make an evolution simulator, that spawns creatures with random properties. Eventually, I'll add reproduction, but as of now the creatures just sort of float around the screen, and follow the mouse somewhat. It interacts with sound from the line in, but I commented those parts out so that it can be viewed on canvas, it shouldn't really change the question, just thought I would point it out. As of now, the framerate is far less than ideal for me, and it slowly lowers as more creatures are spawned. Am I making some fundamental mistake, or am I just running too many functions per frame?